I have installed an OBD display so I can monitor the cooling temperature while driving. I have set the alarm at 100 degrees centigrade. When I was out for a run with an ambient temperature 23ᵒ and stop start on fairly steep hills the temperature exceeded the alarm and reached 114ᵒ. This part of the trip then became quite stressful with the alarm continually sounding. Once on a open road the temperature returned to normal 94ᵒ.

Would this high temperature be seen as typical in these conditions or should I be looking for a cooling system fault or raise the alarm to 120ᵒ.
Any help would be very much appreciated

 

I'm sure this is EXACTLY why the engineers made sure that the temp gauge remained at 'half-scale- for a wide range of temperatures.(no need to alarm the driver with fluctuation)

I remember in the 1970s when Chevrolet (like the Corvette) stopped putting numbers on the temp gauges and simply put C, N, H.

I read a story where some guy replaced the factory gauge with an actual readout gauge and went to the dealer with an OVERHEATING ISSUE.

He saw the engine temp near 200 degrees F and 'freaked-out'.

There was nothing wrong, the EPA and Chevy engineers wanted the engine to run hotter so they could run 'leaner'.

Probably nothing wrong with your car but check the condenser/radiator for debris between the two heat exchangers?

 

you just set the warning wrong nothing wrong with your cooling system.

Set the warming at 113 C (235 F). My 2002 XKR will hit 230 F (110 C) in the Texas and Oklahoma summers when I’m stuck in traffic, A/C going, etc. it cools downs fine once I start moving to 200-205 F (93-96 C). On the highway it runs even cooler. When it’s not so blamed hot my normal temp is around 190 F.

so you see the coolant temp can vary quite a bit with no problems.





Z

 

Thanks for the information guys, I will undertake the good advice you both have suggested:

· check the condenser/radiator for debris between the two heat exchangers

· Set the warning at 113 C

I have just run through the OBD fault codes and had the following :

· P0037 Oxygen Sensor Heater Control Circuit Low (Bank 1, Sensor 2)

· P0480 Cooling Fan 1 Control Circuit

· P1410 Air cleaner inlet control circuit

· 1582 Flight recorder data is stored

· B1410 Front refrigerant control valve

I can assume fault code P0480 will have a direct effect on this issue but I don’t think any of the others will affect the heating issue??

 

Do both cooling fans come on when you turn on the A/C ?

 

When did you last check and clear codes? It can be easy to get hung up on a code that was set months ago and has no current relevance.

 

Yes I clear the codes on a regular basis, and in this instance the codes were cleared the week prior to the issue.

 

I think that i must reevaluate a concern which i had in the other thread. Still want the better radiator though, so i do not have to find out in a few years what kind of plastic used in the Nissens.

 

Just to give feedback regarding this issue, I believe I have found the problem.

When I first checked the fans when they were running it appeared there was air blowing from both fans but it seems the left hand fan was working and also feeding air through the right hand fan. This gave me the impression that both fans were working. After further investigation it showed the plug to the right hand fan motor had come adrift. I am yet to give the car a run under the same conditions but I am quite confident this was the problem.
Thanks everyone for the comments.